package com.bw.controller;

import com.alibaba.fastjson.JSON;
import com.bw.entity.User;
import com.bw.mapper.UserMapper;
import org.spring.kun.common.Md5Utils;
import org.spring.kun.common.TokenUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletResponse;
import javax.validation.Valid;
import java.util.concurrent.TimeUnit;

@Controller
public class UserController {


    @Autowired
    UserMapper userMapper;

    @Autowired
    RedisTemplate redisTemplate;


    @RequestMapping("/loginPage.do")
    public String loginPage(){

        return "login";

    }

    /**
     *   MVC 执行流程   （框架底层的执行原理）
     * @param loginUser
     * @return
     */
    @RequestMapping("/login.do")
    public String login(@Valid User loginUser, BindingResult  result, Model model, HttpServletResponse response){

        if (result.hasErrors()){

            model.addAttribute("error",result.getAllErrors().get(0).getDefaultMessage());

            return "login";
        }

        User userDB =   userMapper.selectByPhone(loginUser.getPhone());
        if (userDB == null){
            model.addAttribute("error","用户不存在");
            return "login";
        }

        String loginUserPassword = loginUser.getPassword();
        String password = userDB.getPassword();
        String salt = userDB.getSalt();

        String md5String = Md5Utils.getMD5String(loginUserPassword + salt);

        if (!md5String.equals(password)){
            model.addAttribute("error","密码错误");
            return "login";

        }

        // cookie 加密用户信息 得到token  把token存入cookie 返回给浏览器  设置过期时间为 30min
        TokenUtils.responseTokenByCookie(userDB,response,30);

        // 把用户存到Redis  里    KEY  -value
        redisTemplate.opsForValue().set(userDB.getPhone(), JSON.toJSONString(userDB),30 , TimeUnit.MINUTES);

        return "redirect:list.do";



    }




}
